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  • 301.
    Amin, Yasar
    et al.
    KTH, School of Information and Communication Technology (ICT), Electronic Systems. KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Feng, Yi
    KTH, School of Information and Communication Technology (ICT), Electronic Systems. KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Chen, Qiang
    KTH, School of Information and Communication Technology (ICT), Electronic Systems. KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Zheng, Lirong
    KTH, School of Information and Communication Technology (ICT), Electronic Systems. KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Tenhunen, Hannu
    KTH, School of Information and Communication Technology (ICT), Electronic Systems. KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    RFID antenna humidity sensor co-design for USN applications2013In: IEICE Electronics Express, ISSN 1349-2543, E-ISSN 1349-2543, Vol. 10, no 4, p. 20130003-Article in journal (Refereed)
    Abstract [en]

    We demonstrate for the first time an RFID tag antenna which itself is humidity sensor and also provides calibration functionality. The antenna is comprised of T-matching network and horizontally meandered lines for impedance matching and reliable near-field communication. The novel contour design provides humidity sensing, and calibration functions whilst concurrently acts as a radiating element along with quadrangular capacitive tip-loading with covered middle portion for far-field communication. The inkjet printed prototypes of the antenna provide effective ambient humidity sensing while demonstrating stable RFID communication. The antenna has a compact size of 1.1 x 10.2 cm for 902-928MHz band.

  • 302.
    Amin, Yasar
    et al.
    KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK. KTH, School of Information and Communication Technology (ICT), Electronic, Computer and Software Systems, ECS.
    Hållstedt, Julius
    KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK. KTH, School of Information and Communication Technology (ICT), Electronic, Computer and Software Systems, ECS.
    Prokkola, Satu
    Tenhunen, Hannu
    KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK. KTH, School of Information and Communication Technology (ICT), Electronic, Computer and Software Systems, ECS.
    Zheng, Li-Rong
    KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK. KTH, School of Information and Communication Technology (ICT), Electronic, Computer and Software Systems, ECS.
    Robust Flexible High Performance UHF RFID Tag Antenna2009In: 2009 11TH ELECTRONICS PACKAGING TECHNOLOGY CONFERENCE (EPTC 2009), NEW YORK: IEEE , 2009, p. 235-239Conference paper (Refereed)
    Abstract [en]

    This paper describes a novel Flexo, Screen and Inkjet printed rounded edges bowtie antenna with T-matching stubs on paper, Kapton (HN) and Teonex Q51 substrate. Paper is one of the paramount nominees for Radio Frequency Identification (RFID) tags, for the reason that it is one of the widely and the cheapest available substrates. Kapton (HN) and Teonex Q51 are distinguished for their flexibility and reliability. The antenna exhibits compact size with outstanding read range of 4 meters and complete coverage of UHF RFID band (860-960 MHz). The results show extreme immunity of versatile antenna against harsh environments. These antennas are flexible which give autonomy for their applications.

  • 303.
    Amin, Yasar
    et al.
    KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK. KTH, School of Information and Communication Technology (ICT), Electronic Systems.
    Hållstedt, Julius
    KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Tenhunen, Hannu
    KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK. KTH, School of Information and Communication Technology (ICT), Electronic Systems.
    Zheng, Li-Rong
    KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK. KTH, School of Information and Communication Technology (ICT), Electronic Systems.
    Design of Novel Paper-based Inkjet Printed Rounded Corner Bowtie Antenna for RFID Applications2010In: Sensors & Transducers Journal, ISSN 2306-8515, E-ISSN 1726-5479, Vol. 115, no 4, p. 160-167Article in journal (Refereed)
    Abstract [en]

    This paper presents a novel inkjet printed rounded corner bowtie antenna with T-matching stubs on paper substrate which is the cheapest and widest available substrate. The antenna exhibits compact size with outstanding read range and complete coverage of UHF RFID band (860-960 MHz). The results show extreme immunity of proposed antenna against paper dielectric constant variation.

  • 304.
    Amin, Yasar
    et al.
    KTH, School of Information and Communication Technology (ICT), Electronic Systems. KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Kanth, R. K.
    Liljeberg, P.
    Akram, A.
    Chen, Qiang
    KTH, School of Information and Communication Technology (ICT), Electronic Systems. KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Zheng, Lirong
    KTH, School of Information and Communication Technology (ICT), Electronic Systems. KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Tenhunen, Hannu
    KTH, School of Information and Communication Technology (ICT), Electronic Systems. KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Printable RFID antenna with embedded sensor and calibration functions2013In: Progress In Electromagnetics Research Symposium Proceedings, Stockholm, Sweden, Aug. 12-15, 2013, Electromagnetics Academy , 2013, p. 567-570Conference paper (Refereed)
    Abstract [en]

    An RFID antenna with integrated humidity sensor and calibration functionality for wireless sensor network is proposed. The antenna is composed of series and shunt stubs for impedance matching and reliability for near-field communication. The innovative ladder contour structure plays the key role for humidity sensing, and sensor calibration. The quadrangular end-tip loading is employed to offer capacitance and stability for far-field communication. The prototypes of the antenna are fabricated and tested: antenna effectively senses the ambient humidity levels while demonstrating stable behavior for RFID communication. The antenna has a compact size of 1 × 10cm for 902-928 MHz RFID band.

  • 305.
    Amin, Yasar
    et al.
    KTH, School of Information and Communication Technology (ICT), Electronic Systems.
    Kanth, Rajeev Kumar
    Turku Centre for Computer Science (TUCS).
    Liljeberg, Pasi
    Turku Centre for Computer Science (TUCS).
    Chen, Qiang
    KTH, School of Information and Communication Technology (ICT), Electronic Systems. KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Zheng, Lirong
    KTH, School of Information and Communication Technology (ICT), Electronic Systems. KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Tenhunen, Hannu
    KTH, School of Information and Communication Technology (ICT), Electronic Systems. KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Green wideband RFID tag antenna for supply chain applications2012In: IEICE Electronics Express, ISSN 1349-2543, Vol. 9, no 24, p. 1861-1866Article in journal (Refereed)
    Abstract [en]

    In this paper, we demonstrate an RFID tag antenna manufactured by advanced inkjet printing technology on paper substrate using novel hole-matching technique for reducing the consumption of substrate material and conductive ink while attaining green RFID tags. In-depth electromagnetic analysis is performed methodologically for optimizing the parameters that effectuate the antenna dimensions. The antenna design is optimized for consistent wideband performance and extended read range throughout the complete UHF RFID band (860-960MHz), while exhibiting benchmarking results when n across cardboard cartons filled with metal or water containing objects.

  • 306.
    Amin, Yasar
    et al.
    KTH, School of Information and Communication Technology (ICT), Electronic Systems. KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Kumar Kanth, Rajeev
    University of Turku, Finland.
    Liljeberg, Pasi
    University of Turku, Finland.
    Chen, Qiang
    KTH, School of Information and Communication Technology (ICT), Electronic Systems. KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Zheng, Lirong
    KTH, School of Information and Communication Technology (ICT), Electronic Systems. KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Tenhunen, Hannu
    KTH, School of Information and Communication Technology (ICT), Electronic Systems. KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Performance-optimized Printed Wideband RFID Antenna and Environmental Impact AnalysisIn: ETRI Journal, ISSN 1225-6463, E-ISSN 2233-7326Article in journal (Refereed)
    Abstract [en]

    This paper presents performance optimized RFID tag antenna, developed by using commercially accessible paper substrates and advanced inkjet printing process to guarantee mechanical flexibility and ultra-low production costs. The proposed antenna structure can endure the variations which emerge in electromagnetic properties of paper substrate due to varying environmental effects. Hole-matching technique is implemented to eliminate the matching network for reducing the consumption of conductive ink. The proposed structure is uniquely evaluated by demonstrating, sustainability and environmental impact analysis that validate the potential for ultra-low cost mass production of RFID tags for future generation of organic electronics. The antenna performance is assessed for cardboard cartons exclusively containing metal cans and water bottles. The experimental characterization of the proposed antenna endorses the wider bandwidth to cover UHF RFID ISM band (860-960MHz), which empowers its usage throughout the globe for supply chain applications. The improved design effectuates return loss of better than -15dB over a wide frequency range while exhibiting outstanding readability from 10.1 meters.

  • 307.
    Amin, Yasar
    et al.
    KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK. KTH, School of Information and Communication Technology (ICT), Electronic, Computer and Software Systems, ECS.
    Prokkola, Satu
    Shao, Botao
    KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK. KTH, School of Information and Communication Technology (ICT), Electronic, Computer and Software Systems, ECS.
    Hållstedt, Julius
    KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Chen, Qiang
    KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK. KTH, School of Information and Communication Technology (ICT), Electronic, Computer and Software Systems, ECS.
    Tenhunen, Hannu
    KTH, School of Information and Communication Technology (ICT), Electronic, Computer and Software Systems, ECS.
    Zheng, Li-Rong
    KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK. KTH, School of Information and Communication Technology (ICT), Electronic, Computer and Software Systems, ECS.
    Low Cost Paper Based Bowtie Tag Antenna for High Performance UHF RFID Applications2009In: NANOTECH CONFERENCE & EXPO 2009, VOL 1, TECHNICAL PROCEEDINGS - NANOTECHNOLOGY 2009: FABRICATION, PARTICLES, CHARACTERIZATION, MEMS, ELECTRONICS AND PHOTONICS / [ed] Laudon M; Romanowicz B, BOCA RATON: CRC PRESS-TAYLOR & FRANCIS GROUP , 2009, p. 538-541Conference paper (Refereed)
    Abstract [en]

    Radio frequency identification (RFID) antenna's versatility in terms of complete coverage of UHF RFID band (860-960 MHz), while keeping the cost factor low, is an important aspect of today's growing demand for security and tracking of multiple objects in a very short time in addition to tag's readability across the globe. This paper presents a novel inkjet printed rounded corner bowtie antenna with T-matching stubs on paper substrate which is the cheapest and widest available substrate. The antenna exhibits compact size with outstanding read range.

  • 308.
    Amin, Yasar
    et al.
    KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK. KTH, School of Information and Communication Technology (ICT), Electronic, Computer and Software Systems, ECS.
    Prokkola, Satu
    Shao, Botao
    KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK. KTH, School of Information and Communication Technology (ICT), Electronic, Computer and Software Systems, ECS.
    Hållstedt, Julius
    KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK. KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.
    Tenhunen, Hannu
    KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK. KTH, School of Information and Communication Technology (ICT), Electronic, Computer and Software Systems, ECS.
    Zheng, Li-Rong
    KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK. KTH, School of Information and Communication Technology (ICT), Electronic, Computer and Software Systems, ECS.
    Inkjet Printed Paper Based Quadrate Bowtie Antennas For UHF RFID Tags2009In: 11TH INTERNATIONAL CONFERENCE ON ADVANCED COMMUNICATION TECHNOLOGY, VOLS I-III, PROCEEDINGS, - UBIQUITOUS ICT CONVERGENCE MAKES LIFE BETTER!, TAEJON: ELECTRONICS TELECOMMUNICATIONS RESEARCH INST , 2009, p. 109-112Conference paper (Refereed)
    Abstract [en]

    Paper substrate is one of the paramount nominees for Radio Frequency Identification (RFID) tags, for the reason that it is one of the widely and the cheapest available substrates. In this paper, for the first time quadrate bowtie antennas with round corners [1] are realized and analyzed on paper substrate for UHF RFID tags. These inkjet printed antennas exhibit high performance which give freedom for their applications. Their area is smaller than the general triangle bowtie antenna and have advantages of smaller area, better return loss in high frequency and higher gain in normal direction of antenna plane compared with general triangular bowtie antenna.d

  • 309.
    Amin, Yasar
    et al.
    University of Engineering and Technology, Taxila, Punjab, Pakistan.
    Shao, Botao
    KTH, School of Information and Communication Technology (ICT), Electronic Systems. KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Chen, Qiang
    KTH, School of Information and Communication Technology (ICT), Electronic Systems. KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Zheng, Li-Rong
    KTH, School of Information and Communication Technology (ICT), Electronic Systems. KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Tenhunen, Hannu
    KTH, School of Information and Communication Technology (ICT), Electronic Systems. KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Electromagnetic Analysis of Radio Frequency Identification Antennas for Green Electronics2013In: Electromagnetics, ISSN 0272-6343, E-ISSN 1532-527X, Vol. 33, no 4, p. 319-331Article in journal (Refereed)
    Abstract [en]

    This article demonstrates in-depth electromagnetic analysis of a radio frequency identification tag antenna manufactured by inkjet printing technology on different paper substrates to achieve ultra-low cost flexible radio frequency identification tags using a novel hole-matching technique for reducing the consumption of substrate material, and conductive ink. Nevertheless, the electromagnetic properties of the paper substrate are vulnerable to various environmental effects. Thus, the proposed antenna design is optimized for consistent wideband performance throughout the complete UHF radio frequency identification band (860960 MHz) while presenting a greater degree of material insensitivity. An advanced antenna design methodological analysis is performed to accomplish an extended read range, while exhibiting benchmarking results when across cardboard cartons filled with metal or water containing objects.

  • 310.
    Amin, Yasar
    et al.
    KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK. KTH, School of Information and Communication Technology (ICT), Electronic, Computer and Software Systems, ECS.
    Shao, Botao
    KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK. KTH, School of Information and Communication Technology (ICT), Electronic, Computer and Software Systems, ECS.
    Hållstedt, Julius
    KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK. KTH, School of Information and Communication Technology (ICT), Electronic, Computer and Software Systems, ECS.
    Prokkola, Satu
    Tenhunen, Hannu
    KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK. KTH, School of Information and Communication Technology (ICT), Electronic, Computer and Software Systems, ECS.
    Zheng, Li-Rong
    KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK. KTH, School of Information and Communication Technology (ICT), Electronic, Computer and Software Systems, ECS.
    Design and Characterization of Efficient Flexible UHF RFID Tag Antennas2009In: 2009 3RD EUROPEAN CONFERENCE ON ANTENNAS AND PROPAGATION, NEW YORK: IEEE , 2009, p. 2682-2684Conference paper (Refereed)
    Abstract [en]

    In this paper meander line antennas with end tip loading, designed for UHF RFID tags are presented. These novel antennas are screen printed on Kapton HN for European frequency band (866-868 MHz) and for North American frequency band (902-928 MHz). Asahi ink is used for screen printing of 25 mu m thick antenna traces which remains conductive even after several times sharp bending of these tag antennas. The results show that the antennas exhibit high performance regarding smaller area, high realized gain and better return loss in the frequency band of interest. These antennas are extremely flexible which give autonomy for their applications.

  • 311.
    Amin, Yasar
    et al.
    KTH, School of Information and Communication Technology (ICT), Electronic, Computer and Software Systems, ECS.
    Tenhunen, Hannu A.
    KTH, School of Information and Communication Technology (ICT), Electronic, Computer and Software Systems, ECS.
    Zheng, Lirong
    KTH, School of Information and Communication Technology (ICT), Electronic, Computer and Software Systems, ECS.
    Blueprint and integration of vastly efficient 802.11A WLAN front-end2006In: WSEAS Transactions on Electronics, ISSN 1109-9445, Vol. 3, no 4, p. 258-261Article in journal (Refereed)
    Abstract [en]

    Next generation wireless communications terminals will demand the use of advanced component integration processes and high density packaging technologies in order to reduce size and to increase performance. This paper presents high density multilayer interconnects and integrated passives used to design high performance prototype filter for 5GHz wireless LAN receiver realized on MCM-D substrate. The thin film implementation of Multichip Module technology is identified as a useful platform for the integration of GaAs MMIC and silicon device technologies for microwave applications where performance, size and weight are critical factors. The ability of the MCM-D technology to provide controlled impedance, microstrip structures and integrated thin film passive components with useful performance in the microwave frequency regime has now been demonstrated.

  • 312.
    Amin, Yasar
    et al.
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Tenhunen, Hannu
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Jamal, Habibullah
    Zheng, Li-Rong
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Duo, Xinzhong
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Chip-package codesign of receiver front end modules for RF/wireless applications2005In: 2005 IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, New York: IEEE , 2005, p. 767-770Conference paper (Refereed)
  • 313.
    Amin, Yasar
    et al.
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT. Computer Engineering Department, University of Engineering and Technology Taxila, Pakistan .
    Tenhunen, Hannu
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Zheng, Lirong
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Duo, Xinzhong
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    SoP design on liquid crystal polymer substrate for 5 GHz RF receiver front-end module2005In: International Microelectronics and Packaging Society - 1st International Conference and Exhibition on Device Packaging 2005: Everything in Electronics Between the Chip and the System, 2005, p. 236-240Conference paper (Refereed)
    Abstract [en]

    Next generation wireless communications terminals will demand the use of advanced component integration processes and high density packaging technologies in order to reduce size and to increase performance. This paper presents highdensity multilayer interconnects and integrated passives used to design high performance prototype filter for 5GHz wireless LAN receiver realized on liquid crystal polymer (LCP) substrate. The thin film implementation of Multichip Module technology is identified as a useful platform for the integration of GaAs MMIC and silicon device technologies for microwave applications where performance, size and weight are critical factors. The ability of the MCM-D technology to provide controlled impedance, microstrip structures and integrated thin film passive components with useful performance in the microwave frequency regime has now been demonstrated.

  • 314. Amir, M.
    et al.
    Baykal, A.
    Güner, S.
    Sertkol, M.
    Sözeri, H.
    Toprak, Muhammet
    KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Functional Materials, FNM.
    Synthesis and Characterization of CoxZn1−xAlFeO4 Nanoparticles2015In: Journal of Inorganic and Organometallic Polymers and Materials, ISSN 1574-1443, Vol. 25, no 4, p. 747-754Article in journal (Refereed)
    Abstract [en]

    Nanocrystalline powders of cobalt and aluminum co-substituted zinc ferrites with general formula CoxZn1−xAlFeO4 (x = 0.0–1.0) have been synthesized for the first time. Using the citrate-microwave technique and the citric acid as combustion–complexion agent (fuel), materials with spinel mono-phase cubic spinel structure were successfully prepared. The characterization of products was done by XRD, SEM and VSM. The crystallite size estimated by Scherrer formula has been found in the range of 7.7–9.6 nm. The magnetic properties were studied by room temperature (RT) VSM magnetization measurements. The small remanent magnetization (Mr) and coercivity (Hc) values reveal the superparamagnetic nature of nanoparticles (NPs) at RT. The extrapolated saturation magnetization (Ms) is maximum for Co0.8Zn0.2AlFeO4 (17.15 emu/g) and minimum for ZnAlFeO4 particles (4.22 emu/g). This case is attributed to high or low amount of cation distribution change from normal to mixed spinel structure. The average magnetic diameters (Dmag) were calculated from magnetic fit studies of M–H spectra. Dmag values are between 8.17 and 8.46 nm and this range is in great accordance with the obtained diameters from XRD measurements. The small Mr/Ms ratios (maximum, 0.219) specify the uniaxial anisotropy according to Stoner–Wohlfarth model for CoxZn1−xAlFeO4 NPs. RT effective anisotropy constants (Keff) were calculated by using Ms and Hc values. Keff constants increased with increasing Co content in the spinel NPs.

  • 315.
    AMIRI DEHBAREZ, AHMAD
    KTH, School of Information and Communication Technology (ICT).
    Utveckling av bokningssystem med .NET2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This project has been carried out on the recently started company Idop AB's behalf and has led to a further development of an existing webbased booking system for the mentioned company. The main goal has been to deliver a web-based booking calendar where advertiser can place their items while stakeholders can book these items. These items may be subject to such houses, cottages and so on.

    The project requires developers and customers to work closely, Scaling Agile Methods which is an agile method, was chosen for this purpose in order to best achieve this aim.

    The development of the booking system was written in a .NET environment in which the programming language was C#. For database, the company Idop AB had chosen SQL server and for interaction with the database Entity Framework.

    The outcome of the project was an online based booking calendar where the owners outsource their vacant properties for rent during specific dates and report the prices for the vacant period. The stakeholders are now able to make a preliminary booking of a specific object at the desired date.

    The report present more detailed description of the above mentioned points and the conclusion of the project.

  • 316.
    Amso, Julian
    et al.
    KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS.
    Faienza, Achille
    KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS.
    IPsec Intrusion Detection Analysis: Using data from an Ericsson Ethernet Interface Board2008Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    IP security (IPsec) is commonly used for protection in Virtual Private Networks (VPN). It is also used for the protection of traffic between nodes in third generation (3G) mobile networks. The main duty of telecommunication operators is to assure the quality of service and availability of the network for their users. Therefore knowledge of threats that could affect these requirements is of relevance. Denial of Service (DoS) and other attacks could constitute serious threats in 3G networks and, if successful, they could lead to financial and reputation damage for the telecommunication operator. One of the goals of each telecommunications vendor is to produce equipment and software in such a way as to reduce the risk of successful attacks upon networks built using their equipment and software. This master’s thesis aims to identify the classes of attacks that could affect the regular operation of an IPsec-protected network. Therefore, the IPsec protocol and its possible weaknesses are explained. As practical demonstration of these ideas, an Intrusion Detection Analyzer prototype for an Ericsson Ethernet Interface board was developed to detect anomalous IPsec-protected traffic.

  • 317.
    Amstutz, Christian
    KTH, School of Information and Communication Technology (ICT).
    Mapping to a Time-predictable Multiprocessor System-on-Chip2012Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Traditional design methods could not cope with the recent development of multiprocessorsystems-on-chip (MPSoC). Especially, hard real-time systems that requiretime-predictability are cumbersome to develop. What is needed, is an efficient, automaticprocess that abstracts away all the implementation details. ForSyDe, a designmethodology developed at KTH, allows this on the system modelling side. The NoCSystem Generator, another project at KTH, has the ability to create automaticallycomplex systems-on-chip based on a network-on-chip on an FPGA. Both of themsupport the synchronous model of computation to ensure time-predictability. Inthis thesis, these two projects are analysed and modelled. Considering the characteristicsof the projects and exploiting the properties of the synchronous model ofcomputation, a mapping process to map processes to the processors at the differentnetwork nodes of the generated system-on-chip was developed. The mapping processis split into three steps: (1) Binding processes to processors, (2) Placement of theprocessors on net network nodes, and (3) scheduling of the processes on the nodes.An implementation of the mapping process is described and some synthetic exampleswere mapped to show the feasibility of algorithms.

  • 318.
    Amusan, Akinwumi Abimbola
    KTH, School of Information and Communication Technology (ICT).
    Simulation of Traveling Wave Electroabsorption Modulators Suitable for 100Gbps2011Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The large signal model for electro-absorption modulators is studied and simulated. In the previous model, the effect of frequency chirp has not been included and also there is no phase information of the optical carrier.

    This thesis focuses on introducing the phase information of the optical carrier by representing it as a time varying sinusoidal voltage as well as modeling frequency chirp in traveling wave electro-absorption modulators by using a voltage dependent transmission line delay. The transmission line is designed as periodic LC section, where all the capacitance values were modeled to have a quadratic dependence on the microwave voltage using the CBREAK model in PSPICE. This means that the transmission line delay will have a linear dependence on the voltage.

    The whole modified model for the modulator is then simulated and the frequency chirp effect on the modulator performance was studied. It is shown that the frequency chirp broadens the modulator spectrum but it has no pronounced effect on the eye diagram. This means that long distance transmission will be mutilated due to dispersion.

    By choosing a small absorption and large change in delay, the phase modulator is simulated and can be fabricated by using a three step quantum well because it has a large change in refractive index and small change in absorption. On the other hand, to fabricate an electro-absorption modulator a rectangular quantum well should be used.

  • 319. An, J.
    et al.
    Yang, X.
    Wang, W.
    Li, J.
    Wang, H.
    Yu, Z.
    Gong, C.
    Wang, X.
    Sun, Licheng
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry. KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
    Stable and efficient PbS colloidal quantum dot solar cells incorporating low-temperature processed carbon paste counter electrodes2017In: Solar Energy, ISSN 0038-092X, E-ISSN 1471-1257, Vol. 158, p. 28-33Article in journal (Refereed)
    Abstract [en]

    Colloidal quantum dot (CQD) solar cells with a ZnO/PbS-TBAI/PbS-EDT/carbon structure were prepared using a solution processing technique. A commercially available carbon paste that was processed at low-temperatures was used as a counter electrode in place of expensive noble metals, such as Au or Ag, which are used in traditional PbS CQD solar cells. These CQD solar cells exhibited remarkable photovoltaic performance with a short circuit density (Jsc) of 25.6 mA/cm2, an open circuit voltage (Voc) of 0.45 V, a fill factor (FF) of 51.8% and a power conversion efficiency (PCE) as high as 5.9%. A reference device with an Au counter electrode had a PCE of 6.0%. The PCE of the carbon-containing CQD solar cell remained stable for 180 days when tested in ambient atmosphere, while the PCE of the Au-containing CQD solar cell lost 48.3% of its original value. Electrochemical impedance spectroscopy (EIS) demonstrated that holes within the PbS CQD were effectively transported to the carbon counter electrode.

  • 320. An, Wei
    et al.
    Baber, Ashleigh E.
    Xu, Fang
    Soldemo, Markus
    KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Material Physics, MF.
    Weissenrieder, Jonas
    KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Material Physics, MF.
    Stacchiola, Dario
    Liu, Ping
    Mechanistic Study of CO Titration on CuxO/Cu(111) (x <= 2) Surfaces2014In: ChemCatChem, ISSN 1867-3880, E-ISSN 1867-3899, Vol. 6, no 8, p. 2364-2372Article in journal (Refereed)
    Abstract [en]

    The reducibility of metal oxides is of great importance to their catalytic behavior. Herein, we combined ambient-pressure scanning tunneling microscopy (AP-STM), X-ray photoemission spectroscopy (AP-XPS), and DFT calculations to study the CO titration of CuxO thin films supported on Cu(111) (CuxO/Cu(111)) aiming to gain a better understanding of the roles that the Cu(111) support and surface defects play in tuning catalytic performances. Different conformations have been observed during the reduction, namely, the 44 structure and a recently identified (5-7-7-5) Stone-Wales defects (5-7 structure). The DFT calculations revealed that the Cu(111) support is important to the reducibility of supported CuxO thin films. Compared with the case for the Cu2O(111) bulk surface, at the initial stage CO titration is less favorable on both the 44 and 5-7 structures. The strong CuxO <-> Cu interaction accompanied with the charge transfer from Cu to CuxO is able to stabilize the oxide film and hinder the removal of O. However, with the formation of more oxygen vacancies, the binding between CuxO and Cu(111) is weakened and the oxide film is destabilized, and Cu2O(111) is likely to become the most stable system under the reaction conditions. In addition, the surface defects also play an essential role. With the proceeding of the CO titration reaction, the 5-7 structure displays the highest activity among all three systems. Stone-Wales defects on the surface of the 5-7 structure exhibit a large difference from the 44 structure and Cu2O(111) in CO binding energy, stability of lattice oxygen, and, therefore, the reduction activity. The DFT results agree well with the experimental measurements, demonstrating that by adopting the unique conformation, the 5-7 structure is the active phase of CuxO, which is able to facilitate the redox reaction and the Cu2O/Cu(111)<-> Cu transition.

  • 321. Anagnostopoulos, I.
    et al.
    Chabloz, Jean-Michel
    KTH, School of Information and Communication Technology (ICT), Electronic Systems.
    Koutras, I.
    Bartzas, A.
    Hemani, Ahmed
    KTH, School of Information and Communication Technology (ICT), Electronic Systems.
    Soudris, D.
    Power-Aware Dynamic Memory Management on Many-Core Platforms Utilizing DVFS2013In: ACM Transactions on Embedded Computing Systems, ISSN 1539-9087, E-ISSN 1558-3465, Vol. 13, no 1, p. 40-Article in journal (Refereed)
    Abstract [en]

    Today multicore platforms are already prevalent solutions for modern embedded systems. In the future, embedded platforms will have an even more increased processor core count, composing many-core platforms. In addition, applications are becoming more complex and dynamic and try to efficiently utilize the amount of available resources on the embedded platforms. Efficient memory utilization is a key challenge for application developers, especially since memory is a scarce resource and often becomes the system's bottleneck. To cope with this dynamism and achieve better memory footprint utilization (lowmemory fragmentation) application developers resort to the usage of dynamic memory (heap) management techniques, by allocating and deallocating data at runtime. Moreover, overall power consumption is another key challenge that needs to be taken into consideration. Towards this, designers employ the usage of Dynamic Voltage and Frequency Scaling (DVFS) mechanisms, adapting to the application's computational demands at runtime. In this article, we propose the combination of dynamic memory management techniques with DVFS ones. This is performed by integrating, within thememorymanager, runtimemonitoringmechanisms that steer the DVFSmechanisms to adjust clock frequency and voltage supply based on heap performance. The proposed approach has been evaluated on a distributed shared-memory many-core platform composed of multiple LEON3 processors interconnected by a Network-on-Chip infrastructure, supporting DVFS. Experimental results show that by using the proposed method for monitoring and applying DVFS mechanisms the power consumption concerning dynamic memory management was reduced by approximately 37%. In addition we present the trade-offs the proposed approach. Last, by combining the developed method with heap fragmentation-aware dynamic memory managers, we achieve low heap fragmentation values combined with low power consumption.

  • 322. Anagnostopoulos, Iraklis
    et al.
    Xydis, Sotirios
    Bartzas, Alexandros
    Lu, Zhonghai
    KTH, School of Information and Communication Technology (ICT), Electronic Systems.
    Soudris, Dimitrios
    Jantsch, Axel
    KTH, School of Information and Communication Technology (ICT), Electronic Systems.
    Custom Microcoded Dynamic Memory Management for Distributed On-Chip Memory Organizations2011In: IEEE Embedded Systems Letters, ISSN 1943-0663, Vol. 3, no 2, p. 66-69Article in journal (Refereed)
    Abstract [en]

    Multiprocessor system-on-chip (MPSoCs) have attracted significant attention since they are recognized as a scalable paradigm to interconnect and organize a high number of cores. Current multicore embedded systems exhibit increased levels of dynamicbehavior, leading to unexpected memory footprint variations unknown at design time.Dynamic memory management (DMM) is a promising solution for such types of dynamicsystems. Although some efficient dynamic memory managers have been proposed for conventional bus-based MPSoC platforms, there are no DMM solutions regarding the constraints and the opportunities delivered by the physical distribution of multiple memorynodes of the platform. In this work, we address the problem of providing customizedmicrocoded DMM on MPSoC platforms with distributed memory organization. Customization is enabled at application-and platform-level. Results show that customizedmicrocoded DMM can serve approximately 7× more allocation requests compared to puredistributed memory platforms and perform 25% faster than the corresponding high-level implementation in C language. 

  • 323. Anam, Hafsa
    et al.
    Habib, Ayesha
    Jafri, Syeda Irum
    Amin, Yasar
    KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Tenhunen, Hannu
    KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Directly Printable Frequency Signatured Chipless RFID Tag for IoT Applications2017In: Radioengineering, ISSN 1210-2512, E-ISSN 1805-9600, Vol. 26, no 1, p. 139-146Article in journal (Refereed)
    Abstract [en]

    This paper proposes a low-cost, compact, flexible passive chipless RFID tag that has been designed and analyzed. The tag is a bowtie-shaped resonator based structure with 36 slots; where each patch is loaded with 18 slots. The tag is set in a way that each slot in a patch corresponds to a metal gap in the other patch. Hence there is no mutual interference, and high data capacity of 36 bits is achieved in such compact size. Each slot corresponds to a resonance frequency in the RCS curve, and each resonance corresponds to a bit. The tag has been realized for Taconic TLX-0, PET, and Kapton (R) HN (DuPont (TM)) substrates with copper, aluminum, and silver nanoparticlebased ink (Cabot CCI-300) as conducting materials. The tag exhibits flexibility and well optimized while remaining in a compact size. The proposed tag yields 36 bits in a tag dimension of 24.5. 25.5 mm(2). These 36 bits can tag 2(36) number of objects/items. The ultimate high capacity, compact size, flexible passive chipless RFID tag can be arrayed in various industrial and IoT-based applications.

  • 324. Anand, K.
    et al.
    Ganapathy, S.
    Kulothungan, K.
    Yogesh, P.
    Kannan, Anand
    KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS.
    A Rule Based Approach for Attribute Selection and Intrusion Detection in Wireless Sensor Networks2012In: International Conference On Modelling Optimization And Computing, Elsevier, 2012, p. 1658-1664Conference paper (Refereed)
    Abstract [en]

    In this paper, we propose a new rule based attribute selection algorithm for removing the redundant attributes which are used in decision making on intrusions in wireless sensor networks. This work focuses mainly on finding important attributes to find Denial of Service attacks. In addition, we used an enhanced MSVM classification algorithm that was developed by extending the existing MSVM algorithm. The experimental results show that the proposed methods provide high detection rates and reduce false alarm rate. This system has been tested using KDD'99 Cup data set.

  • 325.
    Anand, Srinivasan
    et al.
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.
    Berrier, Audrey
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.
    InP-based two dimensional photonic crystals: A material and processing perspective2008In: ICTON 2008: PROCEEDINGS OF 2008 10TH ANNIVERSARY INTERNATIONAL CONFERENCE ON TRANSPARENT OPTICAL NETWORKS, VOL 2 / [ed] Marciniak, M, NEW YORK: IEEE , 2008, p. 25-25Conference paper (Refereed)
    Abstract [en]

    The talk will address fabrication and characterization of InP-based two-dimensional (2D) photonic crystals (PhCs). The emphasis will be on material and processing issues. In particular, high aspect ratio etching of PhCs in the InP-based materials will be discussed, including feature-size dependent etching and its impact on the optical properties of PhCs. The physical basis for modification of carrier lifetimes of quantum wells in etched PhCs due to the so-called accumulated side-wall damage and methods to control carrier lifetimes relevant for emitter and switching applications will be discussed. Fundamental investigations of carrier transport across PhC structures will be reported and a new method to determine the etched side-wall Surface potential will be demonstrated.

  • 326.
    Anand, Srinivasan
    et al.
    KTH, School of Information and Communication Technology (ICT), Material Physics (Closed 20120101), Semiconductor Materials, HMA (Closed 20120101).
    Shahid, Naeem
    KTH, School of Information and Communication Technology (ICT), Material Physics (Closed 20120101), Semiconductor Materials, HMA (Closed 20120101).
    Naureen, Shagufta
    KTH, School of Information and Communication Technology (ICT), Material Physics (Closed 20120101), Semiconductor Materials, HMA (Closed 20120101).
    Li, Mingyu
    KTH, School of Information and Communication Technology (ICT), Material Physics (Closed 20120101), Semiconductor Materials, HMA (Closed 20120101). Zhejiang University, Hangzhou, China.
    Swillo, Marcin
    KTH, School of Information and Communication Technology (ICT), Material Physics (Closed 20120101), Semiconductor Materials, HMA (Closed 20120101).
    InP-based photonic crystal waveguide filters2010In: 2010 Asia Communications and Photonics Conference and Exhibition, ACP 2010, 2010, p. 104-105Conference paper (Refereed)
  • 327.
    Anand, Srinivasan
    et al.
    KTH, School of Information and Communication Technology (ICT), Material Physics, Semiconductor Materials, HMA.
    Shahid, Naeem
    KTH, School of Information and Communication Technology (ICT), Material Physics, Semiconductor Materials, HMA.
    Swillo, Marcin
    KTH, School of Information and Communication Technology (ICT), Material Physics, Semiconductor Materials, HMA.
    InP-Based Photonic Crystal Waveguide Technology for Filtering and Sensing Applications2011In: 2011 13TH INTERNATIONAL CONFERENCE ON TRANSPARENT OPTICAL NETWORKS (ICTON), NEW YORK: IEEE , 2011Conference paper (Refereed)
    Abstract [en]

    Photonic crystal (PhC) components in InP-based materials are of practical importance not only for their unique properties but also for integration with conventional optoelectronic components on InP substrate. Several PhC devices in the substrate approach such as filters, lasers, and waveguides have been demonstrated [1,2] and this has been possible due to the development of deep etching of PhCs in InP [3].

  • 328.
    Anandpadmanabhan, Narayanan
    KTH, School of Information and Communication Technology (ICT).
    Value Added Services in India2011Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Value Added Services (VASs) have become one of the major revenue generators in the telecom industry. Most of the telecom subscribers have started using VAS and it has become an important service for the customers. The objective of the project is to evaluate and analyse the need for value added services in India. The report begins with a discussion of existing VAS provided by 2G wide area cellular technologies and how these will change with the introduction of 3G technology. Following this the value chain of VAS is discussed. Next new trends, drivers, and challenges of the VAS are discussed in detail. The impact of content developers and software development on VAS are discussed. Then a method to analyse VAS is discussed, followed by method of analysing the ringback tones with respect to a company is provided followed by the method to analyse the importance of the content providers in the value chain.

    Then the Mobile commerce VAS is analysed in detail and ringback tone service provided by OnMobile Company is analysed in detail, followed by an analysis of the role of content providers in value chain. A survey on different services provided through VAS is taken among few of the VASs users in India and the results are included with graphs in the report.

    The thesis analysis results are very important in the modern telecommunication industry as VAS plays a major role in generating huge revenue and currently many industries are focusing on to provide mobile commerce services to its customers. The thesis answers various questions like, what are the different M-commerce services that are provided to the customers in the telecom industry. Why OnMobile Company provides different varieties of ringback tones to the user? Why the role of content providers is very important in the Value chain?

    The report concludes with conclusions explaining the different insights that are gained from the analysis of the VAS (M-Commerce), Ringback tones provided by OnMobile, role of content providers in the Value chain and the survey results. It is followed by the some suggestions and possible future work concerning Value Added Services in India.

  • 329.
    Anastasiadis, Nikolaos
    et al.
    KTH, School of Information and Communication Technology (ICT).
    Sideris, I.
    Pekmestzi, K.
    A fast multiplier-less edge detection accelerator for FPGAs2010In: SAC '10 Proceedings of the 2010 ACM Symposium on Applied Computing, 2010, p. 510-515Conference paper (Refereed)
    Abstract [en]

    Real time video is used in a wide variety of applications, ranging from video surveillance to medical imaging. These operations require significant amounts of processing power, especially when high resolution frames are used. A large percentage of processing time is used in edge detection kernels. Thus, accelerating these kernels is of vital importance in achieving satisfactory frame rates for real time performance, even in high resolutions. This paper proposes a hardware coprocessor to the Xilinx Microblaze processor which accelerates edge detection significantly, while keeping the hardware requirements low, by using no multipliers at all. Using a Xilinx Spartan 3E FPGA, we have reported a frame rate of 157 frames per second in 4CIF format, which corresponds to a 4x speedup over the software only solution. The speedup was achieved with only 1131 slices and 5 block RAMs hardware occupation, which makes the solution very attractable.

  • 330.
    Andai, Gabor
    KTH, School of Information and Communication Technology (ICT).
    Performance monitoring on high-end general processing boards using hardware performance counters2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Most of the advanced microprocessors today incorporate on-chip hardware performance counters. These counters are capable to count various events in a non-invasive way, while executing real workloads. Events such as the number of instructions, memory accesses, cache and TLB misses are the most common ones that can be precisely measured.

    The primary accomplishment of this work was to implement a performance monitoring tool, which could be used to evaluate system behaviour on high-end processing platforms. The tool is able to collect data from hardware performance counters and present them in an interpretable way. Moreover, it has support for two different platforms and two operating systems. As a secondary objective, several measurements were carried out on both supported platforms and operating systems to demonstrate the tool’s capabilities, and to solve the potential use-cases.

  • 331.
    Anderlind, Eva
    et al.
    KTH, School of Computer Science and Communication (CSC), Human - Computer Interaction, MDI (closed 20111231).
    Noz, Marilyn E.
    New York University, Department of Radiology.
    Sallnäs Pysander, Eva-Lotta
    KTH, School of Computer Science and Communication (CSC), Numerical Analysis and Computer Science, NADA.
    Lind, Bengt K.
    Karolinska Institute, Department of Medical Radiation Physics.
    Maguire, Gerald Q. Jr.
    KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS.
    Will haptic feedback speed up medical imaging? An application to radiation treatment planning2008In: Acta Oncologica, ISSN 0284-186X, E-ISSN 1651-226X, Vol. 47, no 1, p. 32-37Article in journal (Refereed)
    Abstract [en]

    Haptic technology enables us to incorporate the sense of touch into computer applications, providing an additional input/output channel. The purpose of this study was to examine if haptic feedback can help physicians and other practitioners to interact with medical imaging and treatment planning systems. A haptic application for outlining target areas (a key task in radiation therapy treatment planning) was implemented and then evaluated via a controlled experiment with ten subjects. Even though the sample size was small, and the application only a prototype, results showed that haptic feedback can significantly increase (p0.05) the speed of outlining target volumes and organs at risk. No significant differences were found regarding precision or perceived usability. This promising result warrants further development of a full haptic application for this task. Improvements to the usability of the application as well as to the forces generated have been implemented and an experiment with more subjects is planned.

  • 332.
    Anderlind, Eva
    et al.
    KTH, School of Computer Science and Communication (CSC), Human - Computer Interaction, MDI (closed 20111231).
    Noz, Marilyn E.
    New York University, Department of Radiology.
    Sallnäs Pysander, Eva-Lotta
    KTH, School of Computer Science and Communication (CSC), Human - Computer Interaction, MDI (closed 20111231).
    Maguire Jr., Gerald Q.
    KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS.
    Lind, Bengt K.
    Karolinska Institute, Medical Radiation Physics.
    The value of haptic feedback in medical imaging and treatment planning2006In: Radiotherapy and Oncology, ISSN 0167-8140, E-ISSN 1879-0887, Vol. 81, p. 1277-Article in journal (Refereed)
  • 333. ANDERSEN, JN
    et al.
    WIGREN, C
    KARLSSON, Ulf O
    KTH, School of Information and Communication Technology (ICT).
    SURFACE RELATED CORE LEVEL SHIFTS FOR THE SI(111)SQUARE-ROOT-3X SQUARE-ROOT-3 - AL SYSTEM1991In: Journal of Vacuum Science & Technology B, ISSN 1071-1023, E-ISSN 1520-8567, Vol. 9, no 4, p. 2384-2387Article in journal (Refereed)
    Abstract [en]

    The Si(111) square-root 3 x square-root 3:Al reconstruction has been studied by surface sensitive high resolution core level spectroscopy. It is shown that three components are needed to fit the Si 2p spectra. The Al2p emission is found to consist of more than one component and it is argued that this is related to defects in the overlayer.

  • 334. Andersen, U. L.
    et al.
    Tipsmark, A.
    Laghaout, A.
    Dong, R.
    Jezek, M.
    Björk, Gunnar
    KTH, School of Information and Communication Technology (ICT), Optics and Photonics (Closed 20120101).
    Quantum information processing with discrete and continuous variables2011In: Optics InfoBase Conference Papers, 2011Conference paper (Refereed)
    Abstract [en]

    By means of a hybrid detector we suggest and implement two protocols. We theoretically propose a feasible loophole-free violation of Bell's inequality and we experimentally realize a Hadamard transform of coherent superposition states.

  • 335.
    Andersson, Birger
    et al.
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Bergholtz, Maria
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Edirisuriya, A.
    Ilayperuma, T.
    Jayaweera, P.
    Johannesson, Paul
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Zdravkovic, Jelena
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Enterprise sustainability through the alignment of goal models and business models2008In: CEUR Workshop Proc., 2008, p. 73-87Conference paper (Refereed)
    Abstract [en]

    Business modelling can be used as a starting point for business analysis. The core of a business model is information about resources, events, agents, and their relations. The motivation of a business model can be found in the goals of an enterprise and those are made explicit in a goal model. This paper discusses the alignment of business models with goal models and proposes a method for constructing business models based on goal models. The method assists in the design of business models that conform to the explicit goals of an enterprise. Main benefits are clear and uniform goal formulations, well founded business model designs, and increased traceability between models.

  • 336.
    Andersson, Birger
    et al.
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Bergholtz, Maria
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Edirisuriya, A.
    Ilayperuma, T.
    Johannesson, Paul
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Grégoire, B.
    Schmitt, M.
    Dubois, E.
    Abels, S.
    Hahn, A.
    Gordijn, J.
    Weigand, H.
    Wangler, B.
    Towards a common ontology for business models2006In: CEUR Workshop Proceedings, 2006Conference paper (Refereed)
    Abstract [en]

    To create an understanding of enterprises and the ways they do business, a starting point could be to identify the main actors and the values transferred between them. Business models are created in order to make clear who the business actors are in a business case and to make their relations explicit. The relations are formulated in terms of values exchanged between the actors. The purpose of the work reported in this paper is to create a better understanding of business models by identifying basic notions used in such models. It does so by constructing a common ontology based on three established business model ontologies: e3-value, REA, and BMO. By means of a careful analysis of these ontologies a conceptual schema is created that defines the common concepts. An example is worked out that explains how the common ontology should be understood.

  • 337.
    Andersson, Birger
    et al.
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Bergholtz, Maria
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Edirisuriya, A.
    Ilayperuma, T.
    Johannesson, Paul
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Zdravkovic, Jelena
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Using strategic goal analysis for enhancing value-based business models2007In: BUSITAL 2007 - 2nd International Workshop on Business/IT Alignment and Interoperability, Workshop at the 19th International Conference on Advanced Information Systems Engineering, CAiSE 2007, 2007Conference paper (Refereed)
    Abstract [en]

    Lately business models have been recognized as a foundation for design of operational business processes. The motivation of a business model can be found in the goals of an enterprise which are made explicit in a goal model. This paper discusses the alignment of business models with goal models and proposes a method for constructing business models based on goal models. The method is based on a template and rules based approach. The outputs are business models that conform to the explicit goals of an enterprise. Main benefits are uniform goal formulations, well founded business model designs, and increased traceability between the models. A case study from the health sector is used to argument the way we ground and apply our proposed method.

  • 338.
    Andersson, Birger
    et al.
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Bergholtz, Maria
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Edirisuriya, Ananda
    Ilayperuma, T.
    Jayaweera, P.
    Johannesson, Paul
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Zdravkovic, Jelena
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Aligning goal models and business models2008In: CEUR Workshop Proc., 2008, p. 13-16Conference paper (Refereed)
    Abstract [en]

    This paper has argued that for an enterprise to be sustainable its operational processes should be aligned to its strategic goals. We have focused on a part of the complex issue of business and IT alignment by addressing the problems of aligning business models with goal models and a method for this was proposed. The method approach offers a number of benefits: clear and uniform goal model formulation, well founded business model design, and traceability between models.

  • 339.
    Andersson, Birger
    et al.
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Bergholtz, Maria
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Edirisuriya, Ananda
    Ilayperuma, Tharaka
    Johannesson, Paul
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    A declarative foundation of process models2005In: ADVANCED INFORMATION SYSTEMS ENGINEERING, PROCEEDINGS / [ed] Pastor, O; Chunha, JFE, 2005, Vol. 3520, p. 233-247Conference paper (Refereed)
    Abstract [en]

    In this paper, a declarative foundation for process models is proposed. Three issues in process management and modeling are identified: business orientation, traceability, and flexibility. It is shown how these issues can be addressed by basing process models on business models, where a business model focuses on the transfer of value between agents. As a bridge between business models and process models, the notion of activity dependency model is introduced, which identifies, classifies, and relates activities needed for executing and coordinating value transfers.

  • 340.
    Andersson, Birger
    et al.
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Bergholtz, Maria
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Edirisuriya, Ananda
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Ilayperuma, Tharaka
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Johannesson, Paul
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Gordijn, Jaap
    Gregoire, Bertrand
    Schmitt, Michael
    Dubois, Eric
    Abels, Sven
    Hahn, Axel
    Wangler, Benkt
    Weigand, Hans
    Towards a reference ontology for business models2006In: Conceptual Modeling - ER 2006, Proceedings / [ed] Embley, DW; Olive, A; Ram, S, 2006, Vol. 4215, p. 482-496Conference paper (Refereed)
    Abstract [en]

    Ontologies are viewed as increasingly important tools for structuring domains of interests. In this paper we propose a reference ontology of business models using concepts from three established business model ontologies; the REA, BMO, and e3-value. The basic concepts in the reference ontology concern actors, resources, and the transfer of resources between actors. Most of the concepts in the reference ontology are taken from one of the original ontologies, but we have also introduced a number of additional concepts, primarily related to resource transfers between business actors. The purpose of the proposed ontology is to increase the understanding of the original ontologies as well as the relationships between them, and also to seek opportunities to complement and improve on them.

  • 341.
    Andersson, Birger
    et al.
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV. Department of Computer and Systems Sciences, Stockholm University, Sweden.
    Bergholtz, Maria
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV. Department of Computer and Systems Sciences, Stockholm University, Sweden.
    Grégoire, B.
    Johannesson, Paul
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV. Department of Computer and Systems Sciences, Stockholm University, Sweden.
    Schmitt, M.
    Zdravkovic, Jelena
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV. Department of Computer and Systems Sciences, Stockholm University, Sweden.
    From business to process models: A chaining methodology2006Conference paper (Refereed)
    Abstract [en]

    In this paper we discuss the problem of how to go from a business model to a process model in a systematic way. Business models are economic models used for business analysis, while process models capture low-level business activities and their coordination. We propose a method that starts with a business model where the main actors and their relationships are identified. This forms a basis for design of a final process model. Processes are described in terms of patterns stored in a pattern library.

  • 342.
    Andersson, Birger
    et al.
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Bergholtz, Maria
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Johannesson, Paul
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Purpose driven value model design2009In: CEUR Workshop Proceedings, 2009Conference paper (Refereed)
    Abstract [en]

    It is increasingly recognized that value models offer an abstraction that is useful for the exploration of new business networks and their properties. Among others, value models can be used as input for a risk analysis that is crucial in cross-organizational business process design. However, as value models can be used for many different purposes, there is a risk that they become overloaded and difficult to understand. In this paper we claim that the form and contents of a value model should be governed by its purpose. We identify a number of basic purposes of value models and outline how a value model is affected by those. The approach builds on an analysis and classification of resources and resource exchanges.

  • 343.
    Andersson, Birger
    et al.
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Bider, I.
    Johannesson, Paul
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Perjons, Erik
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Towards a formal definition of goal-oriented business process patterns2005In: Business Process Management Journal, ISSN 1463-7154, E-ISSN 1758-4116, Vol. 11, no 6, p. 650-662Article in journal (Refereed)
    Abstract [en]

    Purpose - Organizations of today are becoming ever more focused on their business processes. This has resulted in an increasing interest in using best practices for business process re-engineering. Two problems arise in connection to using best practices: how to find a best practice that suits particular purposes, and how to ensure that the process from the best practice has the same nature as the process under re-engineering. The purpose of this paper is to address these issues. Design/methodology/approach - The paper suggests using business process patterns, i.e. relatively high level business process models, for making near formal comparison of business processes. The paper analyzes widespread modeling techniques to find out which of them suits the task of building patterns for comparison. Based on this analysis, the state-flow modeling technique is chosen and first steps towards formal definition of business process patterns based on this technique are suggested. Findings - A pattern is defined based on the notions of state space, goal, as a surface in the state space, and valid movements towards the goal. A thinkable procedure of constructing patterns is demonstrated on two real-life examples. A hypothetical procedure for comparing process is suggested but it still needs to be verified in practice. Originality/value - The originality of the paper is the way the patterns are formulated and the underlying model, the state-flow view of processes, upon which the patterns are founded.

  • 344.
    Andersson, Birger
    et al.
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Bider, I
    Perjons, Erik
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Business process support as a basis for computerized knowledge management2005In: PROFESSIONAL KNOWLEDGE MANAGEMENT / [ed] Althoff, KD; Dengel, A; Bergmann, R; Nick, M; RothBerghofer, T, BERLIN: SPRINGER-VERLAG BERLIN , 2005, Vol. 3782, p. 542-553Conference paper (Refereed)
    Abstract [en]

    One of the major factors behind the less successful implementations of computerized knowledge management systems (KMS) is lack of motivation to use such a system on behalf of the end-users. To create such a motivation, i.e., achieve usability, a computerized KMS should be integrated with a business process support (BPS) system and provide three main functionalities: (1) provide a process context, (2) gather automatically experience-based knowledge, and (3) provide an active generalized knowledge base. Such an integrated KMS/BPS can be built using a state-oriented view on business processes. The paper describes a version of a system built according to this view. The system fully implements the first two functionalities, the third one being under development. The system is currently installed at a pilot site. Research work in progress includes creating a formal language for representing an active generalized knowledge base, and investigating the impact of the introduction of an integrated KMS/BPS on the pilot organization.

  • 345.
    Andersson, Birger
    et al.
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Johannesson, Paul
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Zdravkovic, Jelena
    Aligning goals and services through goal and business modelling2009In: Information Systems and E-Business Management, ISSN 1617-9846, E-ISSN 1617-9854, Vol. 7, no 2, p. 143-169Article in journal (Refereed)
    Abstract [en]

    E-services are used as the cornerstones for modelling interaction points of cooperating IT systems, within and between enterprises. So far, research and development of e-services have mainly focused on an operational perspective, such as the development of standards for message exchanges and service coordination. However, on a strategic level, the success of e-services depends on their ability to work as a medium for the exchange of business values. In this paper, we present an approach that utilizes goal and business models as the foundation for designing e-services. The approach can be used to ensure that the developed e-services support the desired goals and business values of involved actors. A case study from the Swedish health care sector is used to ground and apply the presented approach.

  • 346. Andersson, C B M
    et al.
    Andersen, J N
    Persson, P E S
    Karlsson, Ulf O
    KTH, School of Information and Communication Technology (ICT).
    Bulk and surface electronic structure of InAs(110)1998In: Surface Science, ISSN 0039-6028, E-ISSN 1879-2758, Vol. 398, no 3, p. 395-+Article in journal (Refereed)
    Abstract [en]

    The InAs(110) cleavage surface has been investigated by angle-resolved photoelectron spectroscopy. A separation between the In 4d(5/2) bulk component and the valence band maximum of 16.8 eV is found to be consistent with normal emission spectra. Experimental energy band dispersions, E-i(k), for the four bulk valence bands are established along the Sigma-line of the bulk Brillouin zone. A bulk band structure calculation utilizing the augmented plane-wave method is made. The experimental and calculated E-i(k) dispersions are found to be in good agreement with each other. E-i(k(parallel to)) dispersions for two surface-related structures are established along the lines <(Gamma)over bar>-(M) over bar and (Y) over bar-(M) over bar of the surface Brillouin zone. (C) 1998 Elsevier Science B.V.

  • 347. Andersson, C B M
    et al.
    Karlsson, Ulf O
    KTH, School of Information and Communication Technology (ICT).
    Hakansson, M C
    Olsson, L O
    Ilver, L
    Kanski, J
    Nilsson, P O
    Surface atomic structure of InAs((111)over-bar)2x2 and InSb((111)over-bar)2x2 studied by core level spectroscopy1996In: Surface Science, ISSN 0039-6028, E-ISSN 1879-2758, Vol. 347, no 1-2, p. 199-206Article in journal (Refereed)
    Abstract [en]

    Surface sensitive high resolution core level spectroscopy has been applied to the molecular beam epitaxy grown InAs((111) over bar)2 x 2 and InSb((111) over bar)2 x 2 surfaces. For both systems the In 4d core level consists of one dominating component while the Group V core levels are deconvoluted into four components. This analysis is consistent with a surface model where the topmost layer consists entirely of arsenic or antimony. In this model, Group V atoms form trimers bound to Group V atoms in the first double layer, leaving a single Group V rest atom per unit cell.

  • 348. Andersson, C B M
    et al.
    Karlsson, Ulf O
    KTH, School of Information and Communication Technology (ICT).
    Hakansson, M C
    Olsson, L O
    Ilver, L
    Nilsson, P O
    Kanski, J
    Persson, P E S
    Electronic structure of InAs((1)over-bar-(1)over-bar-(1)over-bar)2x2 and InSb((1)over-bar-(1)over-bar-(1)over-bar)2x2 studied by angle-resolved photoelectron spectroscopy1996In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 54, no 3, p. 1833-1840Article in journal (Refereed)
    Abstract [en]

    The electronic structure of molecular-beam-epitaxy-grown InAs((111) over bar)2x2 and InSb((111) over bar)2x2 surfaces is investigated by angle-resolved photoelectron spectroscopy. Valence band spectra, and dispersions of five surface-related structures, are presented. The qualitative similarities of data from the two surfaces indicate that they are very similar, with respect to atomic and electronic structure. Comparisons with other (111) surfaces support the identification of the surface-related structures.

  • 349. ANDERSSON, CBM
    et al.
    ANDERSEN, JN
    PERSSON, PES
    KARLSSON, Ulf O
    KTH, School of Information and Communication Technology (ICT).
    SURFACE ELECTRONIC-STRUCTURE OF INAS(110)1993In: Physical Review B Condensed Matter, ISSN 0163-1829, E-ISSN 1095-3795, Vol. 47, no 4, p. 2427-2430Article in journal (Refereed)
    Abstract [en]

    The electronic structure of the InAs(I 10) cleavage surface has been studied by angle-resolved photoelectron spectroscopy. The bulk band structure has been calculated utilizing the augmented plane-wave method and then the bulk bands have been projected along the lines GAMMA-XBARBAR and GAMMA-YBARBAR of the surface Brillouin zone (SBZ). Three surface-related structures have been found and their initial state versus k parallel-to dispersion along the line GAMMA-XBARBAR and the line GAMMA-YBARBAR of the SBZ has been determined. The structures are identified as A5, A4, and A3 along GAMMA-XBARBAR and as A5, A4, and C2 along GAMMA-YBARBAR.

  • 350. ANDERSSON, CBM
    et al.
    KARLSSON, Ulf O
    KTH, School of Information and Communication Technology (ICT).
    HAKANSSON, MC
    OLSSON, LO
    ILVER, L
    KANSKI, J
    NILSSON, PO
    PERSSON, PES
    SPUTTERED AND ANNEALED INAS(111)OVER-BAR - AN UNRECONSTRUCTED SURFACE1994In: Surface Science, ISSN 0039-6028, E-ISSN 1879-2758, Vol. 307, p. 885-889Article in journal (Refereed)
    Abstract [en]

    The electronic structure of the InAs(111BAR)1 X 1 surface has been investigated by angle resolved photoelectron spectroscopy along the symmetry lines GAMMAKBAR, GAMMAMBAR, and GAMMAMBAR of the surface Brillouin zone. The bulk valence band structure was calculated using a combination of the linear augmented plane-wave method and the relativistic augmented plane-wave method. We have projected the theoretical bulk band structure onto the surface Brillouin zone to separate surface states from surface resonances. Two surface related structures, S1 and S2, have been observed and their E(i)(k(parallel-to)) dispersions are established. Both S1 and S2 show the symmetry of the 1 X 1 surface Brillouin zone, which is consistent with the observed 1 X 1 LEED pattern. We identify S1 as the As-derived dangling bond state, and S2 is associated with the backbonds connecting the As atoms in the surface layer with the underlying In layer.

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